F. Yin, Y. Kai
1996
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Journal
Chemical Research in Chinese Universities
Abstract
The erbium nitrate complex with 6,6'-bis(diphenylphosphine oxide methyl)2,2'-bipyridine-1,1'-dioxide was synthesized and characterized by IR spectra and molar conductance.The crystal and molecular structures of the complex were determined by single crystal X-ray diffraction technique with a four circle diffractometer to give final R and Rw values of 0.054 1 and 0.049 0.The crystal of the complex is monoclinic with a space group C2/c.The unit cell parameters are:α=1.9830(4)nm,b=2.3135(4)nm,c=1. 8600(3)nm;β=96.18(2)°,z=4,V=8.484(3)nm3,Dc=1.33g/cm3. The Er3+ ion is chelated by four P=O and four N-O groups from the two organic ligands. All the coordinated water molecules are replaced by the organic ligands.